#nav {
    height: 82px;
    position: fixed;
    z-index: 5;
    top: 0;
    left: 0;
}

#searchBox {
    height: 144px;
    margin-top: 82px;
    background-color: #d9dde1;
    box-sizing: border-box;
}

.search-form {
    padding-top: 36px;
}

.search-form input {

    height: 48px;
    border: 0;

}

.search-form button {

    height: 48px;
    border: 0;
    color: #ffffff;
    font-size: 16px;
    background-color: #f01414;
}

.search-form-bottom {
    height: 36px;
    line-height: 36px;
    color: #8a9097;
}

.search-form-bottom ul li {
    float: left;
    margin-left: 15px;
}

.search-form-bottom ul li:nth-child(1), .search-form-bottom ul li:nth-child(2) {
    margin-left: 5px;
}

/*--------------main------------------*/

/***  main-top ***/
.main-top-link {
    height: 85px;

    line-height: 85px;
}

.main-top-link ul li {
    float: left;
    font-size: 16px;
}

.main-top-content {
    height: 40px;
    line-height: 40px;
    background-color: #f3f5f7;
}

/***  main-class ***/
.main-class{

}
.main-class-header{
    height:60px;
    line-height: 60px;
    font-size: 25px;
    color: #000000;
    border-bottom: 1px solid #d9dde1;
}

.main-class-content{
    height:160px;
    margin-top: 25px;
    border-bottom: 1px solid #d9dde1;
}
.main-class-footer{
    height:50px;
    line-height: 50px;
    text-align: center;
}

/********    main-answer      ***********/
.main-answer-content{
    margin-top: 15px;
    border-bottom: 1px solid #d9dde1;
}
/********    main-note      ***********/
.main-note-content{
    margin-top: 15px;
    border-bottom: 1px solid #d9dde1;
}
/*---------  footer  ---------*/
#footer{
    height: 90px;
    background-color: #000000;
}
.footer-content ul{
    height: 50px;
    line-height: 50px;
    color: #ffffff;
}
.footer-content ul li{
    float: left;
    margin-left: 15px;
}
.footer-content div{
    color: #ffffff;
    margin-left: 15px;
}